Back to EveryPatent.com
United States Patent | 5,270,212 |
Horiuchi ,   et al. | December 14, 1993 |
This invention relates to an apparatus for analyzing cells in a biological liquid sample, such as blood, in which apparatus a flow passage in a sample pretreatment system can be shortened with a simple construction. A sample metering chamber, a mixing chamber and a measurement liquid extracting chamber are formed in a rotary sliding member of a pretreatment portion. The rotary sliding member is intermittently rotated so as to shift a sample from one chamber to another to perform a necessary treatment. Fluorescence or scattering light with respect to the sample, mixed with a reagent in the pretreatment portion, is detected by a flow cell.
Inventors: | Horiuchi; Hideyuki (Abiko, JP); Sakuraba; Shinichi (Katsuta, JP); Kaneko; Toshio (Katsuta, JP); Tatara; Nobuyuki (Katsuta, JP); Yabe; Ryohei (Katsuta, JP); Ohki; Hiroshi (Tsuchiura, JP); Yamazaki; Isao (Ibaraki, JP); Miyake; Ryo (Enschede, NL) |
Assignee: | Hitachi, Ltd. (Tokyo, JP); Hitachi Instrument Engineering Co., Ltd. (Katsuta, JP) |
Appl. No.: | 841487 |
Filed: | February 26, 1992 |
Mar 20, 1991[JP] | 3-056355 |
Current U.S. Class: | 436/45; 73/61.59; 73/863.73; 73/864.83; 73/864.84; 356/39; 356/244; 422/63; 422/64; 422/82.08; 422/103; 435/287.3; 436/63 |
Intern'l Class: | G01N 035/00 |
Field of Search: | 435/291,289,290,312,316,317.1 422/63,64,82.02,82.05,82.08,103 436/43,45,63 73/864.83,864.84,61.59,64.56,863.73 356/39,244 |
3964513 | Jun., 1976 | Molner | 73/864. |
3971630 | Jul., 1976 | Sandrock et al. | 422/64. |
3991055 | Nov., 1976 | Godin et al. | 73/864. |
4030888 | Jun., 1977 | Yamamoto et al. | 23/253. |
4152391 | May., 1979 | Cabrera | 73/864. |
4186187 | Jan., 1980 | Jahnsen et al. | 422/64. |
4221568 | Sep., 1980 | Boettger | 422/64. |
4254084 | Mar., 1981 | Blum | 435/291. |
4359447 | Nov., 1982 | Welch | 422/64. |
4607526 | Aug., 1986 | Bachenheimer et al. | 73/432. |
4706207 | Nov., 1987 | Hennessy et al. | 364/555. |
4726237 | Feb., 1988 | Yung | 73/864. |
4729876 | Mar., 1988 | Hennessy et al. | 422/103. |
4928539 | May., 1990 | Champseix et al. | 422/64. |
4948565 | Aug., 1990 | Bemis et al. | 422/103. |
4957008 | Sep., 1990 | Proni et al. | 73/864. |
5079959 | Jan., 1992 | Miyake et al. | 73/864. |